package com.server.common.utils.http;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import okhttp3.*;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;

/**
 * @author liutao
 * @title: HttpClientUtil
 * @projectName attpush
 * @description: TODO
 * @date 2021年12月13日 20:48
 */

public class HttpClientUtil {

    public HttpClientUtil() throws IOException {
    }

    /**
     * 发送GET请求
     *
     * @param url        目的地址
     * @param parameters 请求参数，Map类型。
     * @return 远程响应结果
     */
    public static String sendGet(String url, Map<String, String> parameters) {
        String result = "";
        BufferedReader in = null;// 读取响应输入流
        StringBuffer sb = new StringBuffer();// 存储参数
        String params = "";// 编码之后的参数
        try {
            // 编码请求参数
            if (parameters.size() == 1) {
                for (String name : parameters.keySet()) {
                    sb.append(name).append("=").append(
                            java.net.URLEncoder.encode(parameters.get(name),
                                    "UTF-8"));
                }
                params = sb.toString();
            } else {
                for (String name : parameters.keySet()) {
                    sb.append(name).append("=").append(
                            java.net.URLEncoder.encode(parameters.get(name),
                                    "UTF-8")).append("&");
                }
                String temp_params = sb.toString();
                params = temp_params.substring(0, temp_params.length() - 1);
            }
            String full_url = url + "?" + params;
            System.out.println(full_url);
            // 创建URL对象
            java.net.URL connURL = new java.net.URL(full_url);
            // 打开URL连接
            java.net.HttpURLConnection httpConn = (java.net.HttpURLConnection) connURL
                    .openConnection();
            // 设置通用属性
            httpConn.setRequestProperty("Accept", "*/*");
            httpConn.setRequestProperty("Connection", "Keep-Alive");
            httpConn.setRequestProperty("User-Agent",
                    "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)");
            // 建立实际的连接
            httpConn.connect();
            // 响应头部获取
            Map<String, List<String>> headers = httpConn.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : headers.keySet()) {
                System.out.println(key + "\t：\t" + headers.get(key));
            }
            // 定义BufferedReader输入流来读取URL的响应,并设置编码方式
            in = new BufferedReader(new InputStreamReader(httpConn
                    .getInputStream(), "UTF-8"));
            String line;
            // 读取返回的内容
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }

    /**
     * 发送POST请求
     *
     * @param url        目的地址
     * @param parameters 请求参数，Map类型。
     * @return 远程响应结果
     */
    public static String sendPost(String url, Map<String, String> parameters) {
        String result = "";// 返回的结果
        BufferedReader in = null;// 读取响应输入流
        PrintWriter out = null;
        StringBuffer sb = new StringBuffer();// 处理请求参数
        String params = "";// 编码之后的参数
        try {
            // 编码请求参数
            if (parameters.size() == 1) {
                for (String name : parameters.keySet()) {
                    sb.append(name).append("=").append(
                            java.net.URLEncoder.encode(parameters.get(name),
                                    "UTF-8"));
                }
                params = sb.toString();
            } else {
                for (String name : parameters.keySet()) {
                    sb.append(name).append("=").append(
                            java.net.URLEncoder.encode(parameters.get(name),
                                    "UTF-8")).append("&");
                }
                String temp_params = sb.toString();
                params = temp_params.substring(0, temp_params.length() - 1);
            }
            // 创建URL对象
            java.net.URL connURL = new java.net.URL(url);
            // 打开URL连接
            java.net.HttpURLConnection httpConn = (java.net.HttpURLConnection) connURL
                    .openConnection();
            // 设置通用属性
            httpConn.setRequestProperty("Accept", "*/*");
            httpConn.setRequestProperty("Connection", "Keep-Alive");
            httpConn.setRequestProperty("Content-Type", "application/json;charset=utf-8");
            httpConn.setRequestProperty("User-Agent",
                    "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)");
            // 设置POST方式
            httpConn.setDoInput(true);
            httpConn.setDoOutput(true);
            // 获取HttpURLConnection对象对应的输出流
            out = new PrintWriter(httpConn.getOutputStream());
            // 发送请求参数
            out.write(params);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应，设置编码方式
            in = new BufferedReader(new InputStreamReader(httpConn
                    .getInputStream(), "UTF-8"));
            String line;
            // 读取返回的内容
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }

    public static String post(String url, HashMap<String, String > paramsMap){  //这里没有返回，也可以返回string
        OkHttpClient mOkHttpClient = new OkHttpClient.Builder()
                .connectTimeout(2, TimeUnit.SECONDS)
                .writeTimeout(2, TimeUnit.SECONDS)
                .readTimeout(2, TimeUnit.SECONDS)
                .build();
        FormBody.Builder formBodyBuilder = new FormBody.Builder();
        Set<String> keySet = paramsMap.keySet();
        for(String key:keySet) {
            String value = paramsMap.get(key);
            formBodyBuilder.add(key,value);
        }
        FormBody formBody = formBodyBuilder.build();
        Request request = new Request
                .Builder()
                .post(formBody)
                .url(url).header("Content-Type","application/json;charset=utf-8")
                .build();
        try (Response response = mOkHttpClient.newCall(request).execute()) {
            System.out.println(response.body().string());
            return response.body().string();
        }catch (Exception e){
            e.printStackTrace();
        }
        return "";
    }

    public  static String okpost(String url ,Map<String, String> data) throws IOException {
        OkHttpClient okHttpClient = new OkHttpClient.Builder()
                .connectTimeout(2, TimeUnit.SECONDS)
                .writeTimeout(2, TimeUnit.SECONDS)
                .readTimeout(2, TimeUnit.SECONDS)
                .build();
        String json = JSON.toJSON(data).toString();
        System.out.println("请求入参："+json);
        RequestBody requestBody = RequestBody.create(MediaType.parse("application/json;charset=utf-8"), json);
        Request request = new Request.Builder().url(url).post(requestBody).build();
        Response response = okHttpClient.newCall(request).execute();
        String str = response.body().string();
        System.out.println(str);
        return str;
    }

    public static void main(String[] args) throws IOException {
    //rpc请求
        Map<String, String> parameters = new HashMap<>();
                parameters.put("MAC","");
                parameters.put("Card","");
                parameters.put("Time","");
        String res = HttpClientUtil.okpost("",parameters);
        JSONObject jsonObject = JSONObject.parseObject(res);
    }
}
